Figure 1.
I–V properties reveal two different types of Xenopus spinal neurons in culture. A, Voltage-gated potassium currents recorded from type I neurons increase in amplitude with increasing depolarization. B, In contrast, for type II neurons, current amplitudes decrease in amplitude for depolarizations to membrane potentials positive to +60 mV. For A and B, currents elicited for steps to +60, 90, and 120 mV are designated. C, IKv current–voltage relationships for type I (circles; n = 23) and type II (squares; n = 74) neurons.